[news.eclipse.platform.swt] Re: TreeViewer with visible root

[Matthew Hall <matthall@xxxxxxxxxxxxxxxxx>]

Sarah Ettritch wrote:
>  <matthall@xxxxxxxxxxxxxxxxx> wrote in message 
> news:fsjjmo$ll0$1@xxxxxxxxxxxxxxxxxxxx
> > getElements(inputElement) is for the root elements.  The passed-in object 
> > is *always* the viewer input.
> > getChildren(parentElement) is for all levels beneath the root elements.
>
> Aha! In my case, the inputElement is also a rootElement (actually, it's the 
> only root element). Is that the problem? If so, how can I display an entire 
> tree model in a TreeViewer, including its root, without having to root the 
> root with a fake root? 

Doing some further digging, it appears that TreeViewer does not make 
this distinction internally.  A single method is used to determine the 
children of the element (root or otherwise), and inside that method it 
decides whether to call getElements() or getChildren() based on whether 
the parent element is "equal" to the viewer's input.  Thus getChildren() 
is never called because the getElements() result is always { input }.

Would you file a bug for this?
https://bugs.eclipse.org/bugs/enter_bug.cgi?product=Platform&component=UI

To speed up triage, prepend the summary with "[Viewers]".

Matthew